Hoberman Expanding Sphere Glow in The Dark

$32.95

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The polymer links allow the sphere to change in volume 30 times larger.

Features:– Includes an educational booklet about the sphere, a 21 Cool Things To Do activity sheet, a pulley, and hanging hardware.– Instructions for hanging as a cool kinetic energy mobile.– Magically expands from 9.5″ to 30″– For ages 4+